'Earth' Category Archives


Published by . Filed under Earth, Gravity, Moon, Scientific Terms, Time. Total of 1 comment in the discussion.

Photo by: Mbz1 Creative Commons Tides are the periodic fluctuations of large bodies of water. They are caused by the gravitational interaction between the Earth and the Moon in what is generally called tidal forces. Although tidal changes may occur as a result of other factors like the Moon’s altitude and distance, the positions of […]


Universal Time

Published by . Filed under Earth, Scientific Terms, Time. Total of 5 comments in the discussion.

Universal time is the measure of time based on the rotation of earth on its axis. Basically, it is measured from the time after midnight in the Greenwich Time zone in England. It is the time when the sun is at 180 degrees longitude. Photo by: Fonadier Creative Commons The UT is the basis of […]



Published by . Filed under Atmosphere, Earth, Meteorology, Scientific Terms. Total of 1 comment in the discussion.

If you recall your science lessons from school, you know that the earth is surrounded by several layers of air called the atmosphere, as do the other planets in the solar system. It is what allows us to breathe; it lets breathable air circulate within the boundaries it creates and even protects us from objects […]


Last Quarter Moon

Published by . Filed under Earth, Moon, Phenomena, Scientific Terms. Total of 2 comments in the discussion.

The Last quarter moon is basically the precise point of the Moon parading the Sun on the final arc of the lunar process. At this point the moon looks half-lit or illuminated. The moon takes on the shape of a pie sliced in half. The Last quarter moon rises at around the time of midnight, […]


When Was Earth Discovered

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Also called the Blue Planet (due to its color when seen from outer space), the World, and Terra (a Latin term), the Earth is the third planet from the Sun. As any elementary school student could tell you, from that order, the Earth is preceded by Mercury and Venus. And as you may have surmised […]


What Does Earth Look Like

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Our home planet, Earth, is considered as the biggest one when it comes to terrestrial planets. Terrestrial planets are described as dense planets located within the solar system. This planet is just right for living things. The temperature, the atmosphere and weather conditions are just enough to sustain life and keep all living things breathing. […]


Who Discovered Earth

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Asking who discovered the Earth may seem like a silly question—but it isn’t. After all, what is there to discover, if the very first humans lived on the planet anyway? But while this is the case, it took some time before people actually recognized the Earth, the fourth one from the Sun in the Solar […]


Surface of Earth

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Earth is known as the densest planet in the Solar System and the largest among the inner planets. The Earth is actually an oblate spheroid where the poles are slightly flat and the equatorial region is bulging. An oblate spheroid is almost a sphere only with slight differences like the aforementioned. Earth is the only […]


Earth’s Moon

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The Moon is the only natural satellite of Earth and is the 5th largest natural satellite in the solar system with an equatorial radius of 1,738 km. Despite its size, it is second only to Jupiter’s moon in terms of density. Due to the moon’s synchronous rotation with the Earth, only one side of the […]


The Atmosphere of Earth

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Earth’s atmosphere is composed of gases. The gases contained in the atmosphere are made up of 78.09% nitrogen, 20.95% oxygen, 0.93% argon and .038% carbon dioxide. Water vapor and other gases also exist in minute amounts. Volcanic ash, sea spray, pollen, dust and meteoroids can be found in the atmosphere as well. The gasses are […]